House Judiciary Committee Chairman Lamar Smith then said his panel would not consider the Stop Online Piracy Act (Sopa) until a compromise was reached.

The decisions follow protests by online encyclopaedia Wikipedia, and thousands of other websites, which went “dark” in protest for 24 hours earlier this week.

“In light of recent events, I have decided to postpone Tuesday’s vote on the PROTECT IP Act,” Senate Majority Leader Harry Reid, a Democrat, said in a statement on Friday.

Mr Smith, a Texas Republican in the House of Representatives, said in a statement: “I have heard from the critics and I take seriously their concerns regarding proposed legislation to address the problem of online piracy.

“It is clear that we need to revisit the approach on how best to address the problem of foreign thieves that steal and sell American inventions and products.”